Title :
Fabrication techniques and RF properties of niobium thin wall cavities
Author :
Sakano, M. ; Mukoyama, S. ; Shimano, T. ; Matsuba, H. ; Ikeda, M. ; Fujino, T. ; Yamamoto, A. ; Hirabayashi, H.
Author_Institution :
Furukawa Electr. Co. Ltd., Yokohama, Japan
Abstract :
Cavities with the designed resonant frequency of 2856 MHz and a wall thickness of 0.42 mm were fabricated by YAG laser welding. Pulsed RF properties of the single-cell cavities were measured. To obtain cavity Q values, the evaporation rate of liquid He was measured. The maximum values of the peak surface fields were 67 MV/m with a measured Q/sub 0/ of 4*10/sup 5/ at the input pulse width of 6 mu s and 57 MV/m with 3*10/sup 5/ at 10 mu s. The properties changed at an input power of 400 kW, Q/sub 0/ of 1.5*10/sup 6/, and a peak field of 50 MV/m.<>
Keywords :
cavity resonators; niobium; particle accelerators; superconducting devices; Nb; RF properties; cavity Q values; evaporation rate; peak surface fields; resonant frequency; single-cell cavities; superconducting RF cavities; thin wall cavities; Helium; Niobium; Optical design; Optical device fabrication; Pulse measurements; Q measurement; Radio frequency; Resonant frequency; Thin wall structures; Welding;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.164980
